feat: duplicate detection + original URL in description

- Add original recipe URL to Mealie description (appended after blank line)
- Check for duplicate recipes on scrape (match orgURL or URL in description)
- Show warning with link to existing recipe if duplicate found
- User can still import anyway (warning only, not blocking)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/mealie.py

@@ -29,6 +29,40 @@ class MealieClient:
         r.raise_for_status()
         return r.json()
 
+    def find_duplicate(self, url: str, title: str = "") -> dict | None:
+        """Check if a recipe with this original URL already exists.
+
+        Searches by URL in orgURL and description fields.
+        Returns {"slug": ..., "name": ..., "url": ...} or None.
+        """
+        if not url:
+            return None
+        # Search by title to find candidates (Mealie search matches name)
+        search_term = title or url.split("/")[-1].replace("-", " ")
+        r = self.session.get(
+            f"{self.api_url}/api/recipes",
+            params={"search": search_term, "perPage": 50},
+            timeout=10,
+        )
+        if not r.ok:
+            return None
+        for item in r.json().get("items", []):
+            detail = self.session.get(
+                f"{self.api_url}/api/recipes/{item['slug']}", timeout=10
+            )
+            if not detail.ok:
+                continue
+            data = detail.json()
+            org = data.get("orgURL", "") or ""
+            desc = data.get("description", "") or ""
+            if org == url or url in desc:
+                return {
+                    "slug": data["slug"],
+                    "name": data.get("name", data["slug"]),
+                    "url": f"{self.base_url}/g/home/r/{data['slug']}",
+                }
+        return None
+
     def create_recipe(self, recipe: dict) -> str:
         """Create a recipe in Mealie from a scraper result dict.
 
@@ -175,12 +209,17 @@ class MealieClient:
                 "ingredientReferences": [],
             })
 
+        description = recipe.get("description", "")
+        original_url = recipe.get("original_url", "")
+        if original_url and original_url not in description:
+            description = f"{description}\n\n{original_url}".strip()
+
         return {
             "name": recipe["title"],
-            "description": recipe.get("description", ""),
+            "description": description,
             "recipeIngredient": ingredients,
             "recipeInstructions": instructions,
-            "orgURL": recipe.get("original_url", ""),
+            "orgURL": original_url,
             "recipeYield": "",
         }